A 9.90-g bullet has a speed of 1.33 km/s.
(a) What is its kinetic energy in joules?
(b) What is the bullet's kinetic energy if its speed is halved?
(c) What is the bullet's kinetic energy if its speed is doubled?
physics - drwls, Thursday, November 10, 2011 at 9:00pm
(1/2) M V^2.
Make sure M is in kg and V is in m/s.
(b) (1/4) f what it is in (a)
(c) What do you think? What happens to V^2 if you double V?